vivianite


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vivianite

(ˈvɪvɪəˌnaɪt)
n
(Minerals) mineralogy a phosphate of iron
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References in periodicals archive ?
Michael Bell's Plait, Richard Fahey's Exhort, the Archie Watson-trained Vivianite and Irish raider Coeur D'Amour complete the field.
Other entries include Richard Fahey's Exhort, Archie Watson's recent recruit Vivianite and Magnolia Springs from the Eve Johnson Houghton yard.
Some phosphorus based catalysts are also found in different minerals such as vivianite and wavellite.
Iron in organic associations, in silicates, especially clay minerals, in siderite, vivianite and sulfides should not be released by DC(B).
And Michael Halford's 83-rated Spirit of Big Bang, runner-up to Vivianite at Killarney last time and open to improvement, is napped to land the concluding seven-furlong maiden.
Small, bright blue concretions were observed that X-ray diffraction confirmed to be the mineral vivianite ([Fe.sup.2+.sub.3] [(P[O.sub.4]).sub.2]-8[H.sub.2]O).
Vivianite ([Fe.sub.3][[P[O.sub.4]].sub.2] x 8[H.sub.2]O) is another iron-based mineral that could precipitate at this site.
"Archeologists even found items from her 'cosmetics bag', which lay inside her coffin next to her left hip, notably a face brush made from horse hair, and a fragment of an 'eyeliner pencil.' This was made from iron rings, inside which was vivianite, giving a deep blue-green colour on the skin.
This issue of the centennial volume of the journal begins with an article discussing geology, specifically a rare mineral known as vivianite. Given the multitude of connections to geology and geologists that characterized the founding and early years of the TAS, it is most appropriate that an item in the centennial volume relates to this field.
galena, sphalerite) and, rarely, excellent specimens of two species (pyrite and vivianite) have emerged--but because of the highly mechanized mining methods, unfriendly to preservation of crystals, very few Bingham Canyon specimens of anything have been seen on the mineral market over the decades.
Geologists speculated that the materials might be colored by deposits of glauconite (K[(Fe,Mg,Al).sub.2][Si.sub.4][O.sub.10][(OH).sub.2]), which is a hydrous silicate of iron and potassium, or by vivianite ([Fe.sub.2][P.sub.2][O.sub.8] x 8[H.sub.2]O or [Fe.sub.3](P[O.sub.4]) x 8[H.sub.2]O), a hydrous ferrous phosphate (Dana 1966; Carlson 1991).